So I want to polychain my two Slim Phatty’s. I have my midi keyboard sending midi to both the SP’s but when I press the first key, one of the SP’s would play a tone. Then the second key press would play the other SP. Why is this ? I’ve also set up the Poly settings to 1 of 2 and 2 of 2. 
I haven’t had the chance to experiment with this hands-on (maybe some day!), but if I understand the polychain implementation correctly, your setup is doing exactly what it’s supposed to do ~ split chords between two synths.
The Moogs are monophonic, meaning they can only play a single note at a time.
Polychaining is a pseudo work-around, using multiple monophonic synths to simultaneously play different parts of a chord.
If you want them to play the same note simultaneously, don’t polychain -
just linkthem together through the same MIDI channel.
Very intresting, I was wondering if I was doing it right. I think it was the two different patches that made it sound like it wasn’t working right. I really didn’t start the patch from scratch. I also turned off the Poly setting and had it both play at the same time, which sounds great. 4 oscillators are awesome. Thanks for the input. 
I see you got the MF midi murf, whats your take on that and what excatly dose it do. Videos online never did it for me. I have the Freqbox, Ring mod, and Phaser and looking to get the delay and two more pedals for my dual slim phatty setup. any suggestions ?
When I have the poly settings off both of the SP’s plays at the same time. Is that not Polyphoic ?
MIDI MuRF is VERY cool, but takes a while to figure it out (not sure I’m completely there yet!! 
)
Eight swept filters with adjustable cutoffs, each with its own step sequencer, moving in some (sometimes) crazy patterns, swept in unison by an LFO, and can be synced to MIDI clock!
I’m finding it works quite well with repeating bass lines, after the Ring Modulator, and before the Analog Delay, synced to MIDI.
Cool stuff!!
Maybe I’ll post something one of these days…right now, I’m just doing a lot of “tinkering” with the gear to try to figure out what its all capable of doing!!
Not really ~
Polyphonic is a single instrument playing multiple notes simultaneously.
None of the current Moog synths are polyphonic, but they do have multiple oscillators to help create the famous “fat” Moog sound. 
I see what your saying about the polyphonic. So when I turn on the polyphonic settings on both, is that when its truly chained together for that purpose ? I really like how you expaned the midi murf, so is it basicly a EQ and a Arp/Step Sequencer ?
Sort of, but the Moog filters effect the sound more than most EQ’s that I have ever tinkered with. With the pattern sequencer, the MuRF filters act as a rhythmic sound effect that can change the sound of different notes in different ways at different beats based on the current pattern. Kind of hard to explain in writing ~ this is one of those where “hearing is believing”